As you have asked about the GAIL LNG Ship tender, I am giving you information about it, check below for the details
I want to tell you that there is no such tender listed at present.
However, you can check its website regularly to know about it
To check it,


Follow steps given below
Go to GAIL website
Click on Notices/ tenders at the bottom
Click on tenders
Click on Today,.

Here you will get the information about the tender when available.

Here I found following:
REPLACEMENT OF FIRE WATER SPRINKLER SYSTEM IN NAPHTHA TANKS AT GPU GANDHAR
SUPPLY, INSTALLATION, TESTING & COMMISSIONING OF VALVE ACTUATOR FOR AGRA & FEROZABAD
LIQUID NITROGEN
Annual Civil Maintenance Contract for Corporate Office, New Delhi for a period of two years
Pest Control Services For a Period of One Year at BCPL, Dibrugarh
Procurement of master test & measuring instruments for multi function calibration purpose for BCPL , Lakwa