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Payment Options

For your convenience, we offer a variety of payment options:

  • Express Pay

    Pay your bill online. All you need is your invoice and a credit card.
    Make a Payment Today.

  • ACH/EFT Payment

    Conveniently pay invoices directly from your bank account so there’s no need for a credit card, a paper check, or postage. To take advantage of this option, contact our billing team at 800-322-5555, option 6, or send an email to billing@gso.com.

  • Automatic Recurring Credit Card Payment

    Save time and avoid late payments with our recurring auto-pay option. This option is available to customers whose recurring invoices do not exceed $2,500. When you authorize GSO to maintain a credit card on file, your invoice amounts will be charged to this card at the end of each billing cycle. Major credit cards accepted include American Express, Visa, Mastercard, and Discover. Customers are expected to keep GSO|GLS informed of changes to their credit cards, including new cards and updated expiration dates.

  • One-Time Credit Card Payment

    We offer the option to make one-time payments for invoice amounts up to $5,000, using either a VISA, American Express, Mastercard, or Discover card. Contact the billing department at 800-322-5555, option 6 to make a payment over the phone.

  • Payments by check — You may send a check by mail to:
    GSO
    P.O Box 1907
    San Ramon, CA 94583