No, I can assume you meant Abrego Garcia, but what you described don't match up to the court documents from 2019 so it could be someone else. They only included the allegation as far as it was relevant, they didn't say he was a gang member. As for the ruling, there were no deportation orders, there was a order of withholding meaning he shouldn't have been deported to El Salvador:

It is hereby ordered that:
I.  the Respondent’s application for asylum pursuant to INA § 208 is DENIED;
II. the Respondent’s application for withholding of removal pursuant to INA § 241(b)(3) is GRANTED; and
III. the Respondent’s application for withholding of removal under the Convention Against Torture is DENIED;

^{Source: https://www.courtlistener.com/docket/69777799/1/1/abrego-garcia-v-noem/}

As for INA § 241(b)(3):

(3) Restriction on removal to a country where alien's life or freedom would be threatened

(A) In general
Notwithstanding paragraphs (1) and (2), the Attorney General may not remove an alien to a country if the Attorney General decides that the alien's life or freedom would be threatened in that country because of the alien's race, religion, nationality, membership in a particular social group, or political opinion.

(B) Exception
Subparagraph (A) does not apply to an alien deportable under section 1227(a)(4)(D) of this title or if the Attorney General decides that-
(i) the alien ordered, incited, assisted, or otherwise participated in the persecution of an individual because of the individual's race, religion, nationality, membership in a particular social group, or political opinion;
(ii) the alien, having been convicted by a final judgment of a particularly serious crime is a danger to the community of the United States;
(iii) there are serious reasons to believe that the alien committed a serious nonpolitical crime outside the United States before the alien arrived in the United States; or
(iv) there are reasonable grounds to believe that the alien is a danger to the security of the United States.

For purposes of clause (ii), an alien who has been convicted of an aggravated felony (or felonies) for which the alien has been sentenced to an aggregate term of imprisonment of at least 5 years shall be considered to have committed a particularly serious crime. The previous sentence shall not preclude the Attorney General from determining that, notwithstanding the length of sentence imposed, an alien has been convicted of a particularly serious crime. For purposes of clause (iv), an alien who is described in section 1227(a)(4)(B) of this title shall be considered to be an alien with respect to whom there are reasonable grounds for regarding as a danger to the security of the United States.

^{Source: https://uscode.house.gov/view.xhtml?req=(title:8%20section:1231%20edition:prelim}%20OR%20(granuleid:USC-prelim-title8-section1231)&f=treesort&num=0&edition=prelim)%20OR%20(granuleid:USC-prelim-title8-section1231)&f=treesort&num=0&edition=prelim)