GR number range maintain

Dear All,

I have 2 company code and I want to create 2 number range interval

for 1st 5000000000 to 5999999999

and 2nd 600000000 to 6999999999

Shall I have two create two GR doct type like we1, we2...........or

How can I do it?

Thanks in advance

Shuvankar