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Recruits/ASVAB Guide/GM
Army/Marines·Line Score Deep Dive

ASVAB GM Score

General Maintenance

FormulaGS + AS + MK + EI= GS + AS + MK + EI

What GM Measures

GM covers general maintenance and ordnance roles. It's broader than MM — adding science (GS) and math (MK) to the shop and electronics knowledge. GM positions typically involve maintaining and servicing a wider range of equipment, including weapons systems and ordnance.

Maintenance at this level requires scientific troubleshooting (GS), practical shop skills (AS), the math to follow technical manuals precisely (MK), and electronics knowledge for modern systems (EI). It's the "thinking mechanic" composite.

Score Benchmarks

88General maintenance MOS entry requirements (GM 88)
95Comfortable for most ordnance and maintenance roles
105Competitive for advanced maintenance positions

How to Improve Your GM Score

Subtests ranked by impact on your GM score. Improving the top-ranked subtest first maximizes cross-composite benefit.

#1GSGeneral Science

Physics and chemistry principles for troubleshooting. GS feeds EL, FA, M too.

#2MKMathematics Knowledge

Technical manual calculations — tolerances, conversions, measurements.

#3ASAuto & Shop

Practical shop operations. Watch hands-on video if you lack the background.

#4EIElectronics Information

Modern equipment has electronic components regardless of category.

The Insight

GM and EL share three of four subtests (GS, MK, EI) — the only difference is AR vs. AS. If you're targeting both, EI is the highest shared-leverage subtest, and AS is your EL-only wildcard. Studying GS and MK serves both composites simultaneously.

Related Composites — Improve Together

MMMechanical MaintenanceELElectronicsMMechanical (Air Force)
MOS Qualifier →Enter your scores and see every job you qualify forPractice Test →Free practice questions for all 9 subtests