i had a jd and gt set up for 6 monthes, they got allong for a few monthes, but in due time the gt wanted to make my dempsey its b*tch,,,,
they would fight and fight till i had to go get a 40 for my jd, (im not gettign rid of him)
so from my experience ,,, no
but its worth a shot cause both fish kick ass, and if you can get them to co exist then your golden