The 2015 state average for students in public schools was 70 percent.
For GCHS, its college enrollment rate marks a decline since 2014, when 56.4 percent of its graduates chose post-secondary education.
Among high schools in Metro East, the class of 2015 college readiness rates at Valmeyer High School (61.0 percent), Calhoun High School (46.2 percent), Bunker Hill High School (45.1 percent), Alton High School (40.0 percent) and East Alton-Wood River High Sch (25.0 percent) were all higher than at GCHS. East St Louis Senior High School (5.4 percent), Madison Senior High School (5.9 percent), Cahokia High School (8.9 percent) and Gillespie High School (44.2 percent) were all lower.
The data, collected by the National Student Clearinghouse, includes two and four year colleges.
Enrollment at GCHS in 2015 was 1,978. 500 (25.28 percent) were seniors.
Also according to ISBE, 25.1 percent of GCHS seniors were "college ready" in 2015, versus an average of 46 percent statewide.
All students who score a 21 on the ACT qualify as "college ready."
GCHS students did better on reading (26.4 percent) and English (42.1 percent) and worse on math (16.2) and science (20.8).
Only 9.8 percent of GCHS students were college ready in all four subjects, according to ISBE.
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