RA2E1 which timer to use?

I'm making a system that gets the signal of a hall sensor attached to a fan, the faster it spins the faster is the signal, i want to use the interrupts on the RA to count the rising edge and calculate the RPM with the amount of rising edges in a specific time, what timer should i use? i'm trying to use the R_GPT but when i StatusGet it giver me a tipe of data i cant use with an if statement, how can i do it and what is the best timer for this?