I believe the Germans have a 7.62 version of the G-36. That was the G-3, which came in several variants and was based on the CETME, designed in Spain by German engineers, who then took the design to H&K (legally). It foremd the basis for many H&K weapons, such as the MP-5, for example.
I have a "parts" gun contructed on a new receiver that was once (mostly) a Portuguese G-3, (although some interal parts do say H&K on them.
That said, many think the various versions of the FAL were better than the G-3. All three are good guns, (M-14, G-3, FAL).