"11.7.3.2 Notwithstanding the above, a flight may be planned under the IFR by day to a destination aerodrome which is not served by a radio navigation aid without the requirement to provide for a suitable alternate aerodrome, provided that
a. not more than SCT cloud is forecast below the final route segment LSALT plus 500FT and forecast visibility at the destination aerodrome is not less than 8KM; and
b. the aircraft can be navigated to the destination aerodrome in accordance with para 4.1"
Taken with the aforementioned flight planning requirement:
"For a flight to a destination for which a prescribed instrument approach procedure does not exist, the minimum requirement is a GAF."
....then I would agree with mmm345 that in the specific scenario of the OP, an IFR dispatch by day without an alternate is legal based on a GAF only.