Gamprin is a municipality of Liechtenstein, on the Rhine on the border with the municipality of Sennwald, in Switzerland. It had 1,690 inhabitants …Gamprin is a municipality of Liechtenstein, on the Rhine on the border with the municipality of Sennwald, in Switzerland. It had 1,690 inhabitants in 2019. The municipality contains the village of Bendern and scattered hamlets and the Liechtenstein Institute and LGT Group.