| Name | Type | Circle | Bench | Formed | Notes |
| Gandersheim | Abbacy | | | | 856: Abbey of Gandersheim founded by Duke Ludolf of Saxony 1793: Council of Princes 1803: To Brunswick |
Guelders Gelderland Geldern Gelre | 1096:County 1317: HRE Prince 1339: Duchy | | | | 1179: Inherited County of Zutphen by marriage 1247: Acquired the pawned Imperial city of Nijmegen 1393: Inherited Duchy of Julich 1473: To the Dukes of Burgundy 1512: Burgundian Circle 1579: Joined the Union of Utrecht 1582: HRE Council of Princes 1672: French occupation 1713: Southern Gelderland fell to Prussia 1795: To Batavian Republic To Kingdom of Holland 1810: To France 1815: Tol Kingdom of The Netherlands |
| Gelnhausen | Imperial Free City | | | 1170 | 1803: Annexed to Hesse-Cassel |
| Gemen | Lordship | Low Rhen | | 962: 1st mention of Gemen | 1282: Gemen a fief of the Counts of Cleves 1492: Lords of Gemen extinct; passed to Counts of Schaumburg and Holstein-Pinneberg through the heiress Cordula of Gemen Combined with Schaumburg to form County of Schaumburg and Gemen 1640: Passed to the Counts of Limburg-Styrum 1644: In a partition, Gemen passed to the line of Limburg-Styrum-Gemen 1782: With extinction of Gemen branch, Gemen inherited by the line of Limburg-Styrum-Iller-Aicheheim 1800: Passed to the Barons of Bomelberg 1806: Mediatized to the Princes of Salm-Kyrburg 1810: To France 1814: To Prussia |
| Gemert | HRE Lordship | | | | 1100s: Free Imperial Lordship founded 1366: To Teutonic Order 1647-1662: Dutch occupation 1794: French occupation 1795: To Batavian Republic |
| Geneva | County | | | 1034 | 1401-1405: Amadeus VIII purchased all rights to Geneva from their legatees and from the Bishopric of Geneva |
| Geneva | Bishopric 1154: Prince-Bishopric | Upp Rhen | | | |
| Geneva | 1533: Free Imperial City | | | | 1156: Ruled by Bishops of Geneva<br?1798-1813: French occupation |
| Gengenbach | Abbacy | Swab | | | 1793: Council of Princes |
| Gengenbach | Imperial City | Swab | SW | c1250 | 1803: Mediatized to Baden |
| Gernrode | Abbacy | | | c959/961 by Margrave Gero | 961: Under Imperial protection 1512: To Upper Saxon Circle 1610: Secularized to Anhalt 1793: Council of Princes |
| Gerlachsheim | Lordship 1804: HRE Principality of Krautheim and Gerlachsheim | | | | 1221: 1st mention of Gerlachsheim To Lordship of Zimmern-Luden Inherited by Elizabeth of Wertheim 1319: Donated by Elizabeth to Gerlachsheim Abbey 1803: To Salm-Reifferscheid-Krautheim 1806: Mediatized to Baden |
| Gerolstein and Bettingen | County | | | 1533: Partitioned from Blankenheim and Gerolstein | 1697: Annexed to Blankenheim |
| Geyer-Giebelstatt | 1685: HRE County | | | | |
Giech HRE Count & Lord of Giech | Lordship 1680: HRE Barony 1695: HRE County | FR | FR | 1333 | 1720-1723: immediate Lords of Wittem 1726: Imperial Estate 1791: Under ovelordship of Prussia |
| Giengen | Imperial City | Swab | SW | c1250 | 1803: Mediatized to Württemberg |
| Gimborn | 1631: Imperial Lordship 1682: County | | | | Since the 1200s, Gimborn belonged to the Lords of Sankt Gereon in Cologne, Berg, Mark, Kruwell, Burtscheid, Nesselrode and Harff 1273: Pawned by Count Adolf of Berg to Count Engelbert of Mark 1400s: Gimborn is mentioned as a fief of Sankt Gereon in Cologne 1610: Gimborn elevated to the "Unterherrschaft" of Brandenburg 1782/1783: Sold to the Counts of Wallmoden 1806: To the Grand Duchy of Berg 1815: To Prussia |
| Gimborn-Neustadt | Lordship 1631: HRE County | | | | |
| Glarus | Imperial valley | | | 1415 | 1648: Left Empire as member of Swiss Confederation |
| Glatz | 1459: County | | | | 981: To Bohemian Prince Slavnik 995-1305: To Premyslid dynasty 1459: Counts of Glatz elevated to HRE Prince 1477: Granted Lordship of Hummel by Bohemian King 1526: Passed to Austrian Habsburgs together with Bohemia 1763: To Prussia |
| Gleichen | 1162: County | | | 1228: Partitioned from Tonna | 1124 and 1137: Passed to Archbishopric of Mainz To Counts of Tonna (extinct 1631) 1345: Partitioned 1631: Territory divided among Hohenlohe, Mainz, Schwarzburg and Trautenburg 1639: To Hatzfeld 1803: To Prussia |
| Gleichenstein | County | | | 1227: Partitioned from Tonna | 1294: Annexed to Mainz |
Gmünd - see under "Schwäbisch Gmünd" | | | | | |
| Godesberg | County | | | 1276: Partitioned from Neuenahr | 1465: Partitioned into Alpheim and Bedburg |
| Goldineshundare | County | | | 950: Partitioned from Cläven | 1067: Extinct |
| Goltstein | 1694: HRE Count | | | | 1771: immediate LOrds of Slenaken |
| Gondorf | Lordship | | | 1611: Partitioned from Saffig | 1692: Annexed to Nickenich |
Gorizia Gorz | County 1365: HRE Princely County 1754: Princely County of Gorizia and Gradisca | n/a | | | 1031: To Counts of Eppenstein 1090: To Counts of Lurn Acquired Tyrol by marriage 1258: Division into Gorz and Tyrol (extinct 1335) 1500: Inherited by Austria 1747: United to form Gorizia and Gradisca 1809: French occupation |
| Goslar | Imperial City | Low Sax | RH | | 1803: Mediatized |
Gräfenthal Grafenthal | Lordship | | | 1439: Partitioned from Pappenheim | 1536: Re-annexed to Pappenheim |
| Gradisca | 1647: County 1754: Princel County of Gorizia and Gradisca | Aust | n/a | 1511: Annexed to Austria | 1647: To Eggenberg 1717: To Austria 1747: United to form Gorizia and Gradisca |
| Grandvillars | Lordship | | | | |
| Granges | Lordship | | | | |
| Gravenegg | | | | | Acquired Eglingen |
Grävenitz Gravenitz HRE Count of Grävenitz | 1707: HRE Counts | | | | 1718-1731: immediate Lords of Welzheim 1726: Imperial Estate |
Grävenstein Gravenstein | Lordship | | | | |
| Greifensee | Lordship | | | | |
| Greyerz | County | | | | |
| Groningen | Lordship | | | | 1512: Burgundian Circle 1579: To United Provinces |
Grubenhagen - see "Brunswick-Grubenhagen" | | | | | |
| Grubenslagen | Principality | | | | |
| Guelders | c1088: Landgraviate 1339: Duchy, claimed the status of archduchy | Burg | PR | 1082 / 1096 | 1543: To Burgundy After 1581: divided between United Provinces and Southern Netherlands 1795: Annexed to France |
| Gundelfingen | Lordship | Swab | | | 1008: 1st mention of Gundelfingen 1647-1768: To Furstenberg |
| Gurk | 1072: Bishopric Prince-Bishopric | Aust | | 1072 | 1803: Annexed to Carinthia by Austria |
| Gutenstein | Lordship | | | | 1613: Pledged to Margraves of Burgau 1735: Acquired by Counts of Castell |
| Gutenzell | Abbacy | Swab | | | 1793: Council of Princes |