>In VFP 7, is it possible to set an array as Rowsource for a grid?

No, but you can create a cursor with appropriate structure and copy data from array into the cursor.

CREATE CURSOR Mycursursor ( ... )
APPEND FROM ARRAY Myarray

Be advised that if the array is one-dimensional, APPEND FROM ARRAY adds only one record to the table. The workaround is to redefine the array in following way

DIMENSION Myarray[ ALEN(Myarray), 1]