UPDATE 1-Grupo Mexico seeks to boost stake in airport operator

* Miner seeks stronger hold in airport operator

* GMexico, unit had 23.5 pct stake in GAP as of April

MEXICO CITY, June 13 (Reuters) - Mexican miner Grupo Mexico (GMEXICOB.MX) said on Monday it plans to increase its stake in airport operator Grupo Aeroportuario del Pacifico (GAP) (GAPB.MX) (PAC.N) through a share acquisition.

The copper giant said in a filing with the Mexican stock exchange that the it wants to buy stock equivalent to more than 30 percent of the capital in GAP at no more than 50 pesos per share.

According to a Securities and Exchange Commission filing, Grupo Mexico and a subsidiary held 23.5 percent in GAP as of April.

The miner, which did not detail its current stake in GAP, closed at 38.37 pesos on Monday.

Grupo Mexico and GAP teamed last year to bid for the construction of a new airport in Mexico's Caribbean in an effort to expand its infrastructure business. They were one of two groups in the race.

But the plan flopped in May after the Mexican government said the participants did not fulfill some security requirements, declaring the process void.

Earlier this month, Grupo Mexico said it would appeal against the government's rejection of its Riviera Maya airport bid, saying the reasons given were not sound, relevant or true. (Reporting by Cyntia Barrera Diaz) (Mexico City newsroom 5255 5282 7153)