Gold Line Inc.

Hyattsville, MD Doing business as Gray Line Sightseeing Gold Line Inc. Part of Frank Martz Coach Company

Company facts

Self-certified in SAM.gov: For Profit Organization
Entity structure: Corporate Entity (Not Tax Exempt)
NAICS codes registered in SAM.gov: 485210 Interurban and Rural Bus Transportation Primary

485510 Charter Bus Industry

487110 Scenic and Sightseeing Transportation, Land

811111 General Automotive Repair

811192 Car Washes
Corporate family: Frank Martz Coach Company Parent T4KEMY1NRTN7

Gold Line Inc. T4AFTJAHWAV7
SAM.gov registration date: Oct 8, 2001
Physical address: 5500 Tuxedo Rd, Hyattsville, MD 20781, USA
Website: martzbus.com
Founded: 1908
Employees: 51-250
Estimated annual revenue: $10M-$50M
Industry: Industrials

Transportation

Road & Rail

Ground Transportation
SIC code: 41 Local & Interurban Passenger Transit
Profiles: LinkedIn

X

Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated Nov 21, 2025.

Gold Line Inc.'s 5 most recent federal contract and grant awards, newest first. Amounts are dollars obligated.
Award	Agency	Obligated	Awarded
CGC campbell bus charter transporation. Contract · 70Z08021PP2YG6600	Coast Guard	$27,469	Jul 9, 2021
Bus cleaning - 20PAX - TOG Contract · W91QV118P0139	MICC Fort Belvoir	$33,218	Sep 16, 2018
Bus restroom dump services Contract · M0026417P0246	Marine Corps	$15,600	Sep 29, 2017
Cleaning service for TOG/tusab/MDW Contract · W91QV115P0266	MICC Fort Belvoir	$61,800	Sep 15, 2015
Toilet dump Contract · M0026415P0111	Marine Corps	$5,629	Apr 10, 2015

Gold Line Inc.'s Unique Entity ID (UEI) in SAM.gov is T4AFTJAHWAV7.

Gold Line Inc.'s CAGE code is 1BVX3.

Gold Line Inc.'s primary NAICS code is 485210 (Interurban and Rural Bus Transportation).

Gold Line Inc.'s physical address in SAM.gov is 5500 Tuxedo Rd, Hyattsville, MD 20781, USA.

Yes. Gold Line Inc.'s SAM.gov registration is active through November 19, 2026.

Gold Line Inc. is part of Frank Martz Coach Company.

Gold Line Inc.'s most recent federal contract award is CGC campbell bus charter transporation (70Z08021PP2YG6600), from Coast Guard, on July 9, 2021.

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