Looking at the 07/09 score differences, it seems his interest plays a BIG role in test results and probably school results too. The lower score on coding seems to tie into what you've observed with him avoiding math and writing assignments.
Coding - Visual motor coordination; speed; concentration
An interesting performance subtest that measures visual motor skill. Coding gives clues to basic deficiencies in visual motor performance needed for writing. Good short-term memory improves performance on coding. It also factors with freedom from distractibility and the ability to concentrate to accomplish a visual motor task within time constraints.
Maybe you can find ways to increase his interest in those things like writing and math by removing the barriers that may be turning him off. For example, using dictation for writing to get around the motor skill.
Will the new scores be enough to get him in the gifted program? If so, that may help with the interest piece. Otherwise you may want to have him test in a better environment with someone who's experienced with gifted children. Good luck!
