No. GH will do nothing for inflammation/tendonitis. I find it funny how people think GH is the cure all: skin, injuries, youth. I would say try BPC and TB500, but i've used both many times from a number of sources, even one on this board, and it has done nothing for injuries. I believe the placebo effect is a powerful thing with the online gym rat community.

Treatment for tendonitis is: rest, ice, anti-inflammatories, rehab/strengthen. You can also try class 4 laser, shockwave, and IASTM.