Obviously it won't come close to insulin, but do you think using a sulphonylurea drug with GH would be beneficial, as safer option to insulin?
Check out these studies on sulphonylureas (increases glucose uptake, BCAA uptake and Glycogen Synthesis) :
http://www.ncbi.nlm.nih.gov/pubmed/2951064
http://www.ncbi.nlm.nih.gov/pubmed/12453949
http://www.ncbi.nlm.nih.gov/pubmed/8920942