There are no guarantees but it is widely assumed and advised that males will probably become aggressive during breeding season.
Also adopting an ig that was nice to former owners doesnt mean it will like you .
My biggest warning for people considering females, keep about 800 bucks in the bank at all time. Gravid females often have problems leading to emergency surgery which can run 400 to a thousand bucks a spay.
Dont give up on your boy just yet, seasons can last 3 to 4 months in some cases.
Out of curiosity, where do you live? And do you know what region your igs bloodline is from? Is he long and lean or big and bulky ?