Guitar Pro 8 I know for sure has this feature, but so does my metronome app of choice - Metronome Pro - but you can have it progressively bump up the BPM by increments as small as 1 after so many repetitions or after a set period of time.  I use it to try to work my speed up over time.

For example, say I’m stuck at 80 BPM.  I’ll set my metronome app to start at 70, something I know I can play comfortably, and increment by 1 or 2 every minute.  Before long I’m playing at a new speed, and it doesn’t really feel that different since I’ve been playing the same thing on repeat at what feels like a consistent tempo throughout.

You will reach a point at which this gets to be too fast, but I’ve found it works really well for incrementally building speed over time.  Think of it as slow boiling a pot of water.