Regd ; using R5F100GGAFB controller instead of R5F100GJAFB for kurumi design


I find difficulty in getting GR boards in INDIA to kick start with renesas ., can i use  R5F100GGAFB controller instead of   R5F100GJAFB for  kurumi own design ., kindly advice . i pasted here two controllers compare spec sheet . 

Is there a kind of bootload procedure for GR-KURUMI board like UNO . Kindly advice .