You CANNOT carry on ANY SCHOOL grounds. It is pretty much the same as in MA.
This is the CT law, with my bold emphasis added:
http://www.cga.ct.gov/2005/pub/Chap952.htm#Sec53a-217b.htm
Sec. 53a-217b. Possession of a weapon on school grounds: Class D felony. (a) A person is guilty of possession of a weapon on school grounds when, knowing that such person is not licensed or privileged to do so, such person possesses a firearm or deadly weapon, as defined in section 53a-3, (1) in or on the real property comprising
a public or private elementary or secondary school, or (2) at a school-sponsored activity as defined in subsection (h) of section 10-233a.
(b) The provisions of subsection (a) of this section shall not apply to the otherwise lawful possession of a firearm (1) by a person for use in a program approved by school officials in or on such school property or at such school-sponsored activity, (2) by a person in accordance with an agreement entered into between school officials and such person or such person's employer, (3) by a peace officer, as defined in subdivision (9) of section 53a-3, while engaged in the performance of such peace officer's official duties, or (4) by a person while traversing such school property for the purpose of gaining access to public or private lands open to hunting or for other lawful purposes, provided such firearm is not loaded and the entry on such school property is permitted by the local or regional board of education.
(c) Possession of a weapon on school grounds is a class D felony.
This is the MA law, with my bold emphasis again added:
http://www.mass.gov/legis/laws/mgl/269-10.htm
(j) Whoever, not being a law enforcement officer, and notwithstanding any license obtained by him under the provisions of chapter one hundred and forty, carries on his person a firearm as hereinafter defined, loaded or unloaded or other dangerous weapon in any building or on the grounds of
any elementary or secondary school, college or university without the written authorization of the board or officer in charge of such
elementary or secondary school, college or university shall be punished by a fine of not more than one thousand dollars or by imprisonment for not more than one year, or both. For the purpose of this paragraph, “firearm” shall mean any pistol, revolver, rifle or smoothbore arm from which a shot, bullet or pellet can be discharged by whatever means.
Any officer in charge of an
elementary or secondary school, college or university or any faculty member or administrative officer of an
elementary or secondary school, college or university failing to report violations of this paragraph shall be guilty of a misdemeanor and punished by a fine of not more than five hundred dollars.
So I don't think it's the same as MA law, it reads differently. I know comparing two different states law's is like comparing apples and oranges, but it seems to me that it would be included on that. I've even checked the student policies of some CT colleges, and found that while posessing a firearm on college grounds violates school policy, there's no mention of it being illegal.
I'll keep at it with Google, maybe try to find a case with a conviction for carrying in a college in CT.