"gpl" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "unc"
      },
      "expansion": "gpl (plural unc)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "grams per litre"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Units of measure",
          "orig": "en:Units of measure",
          "parents": [
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of grams per litre."
      ],
      "id": "en-gpl-en-noun-EJkOBlig",
      "links": [
        [
          "gram",
          "gram#English"
        ],
        [
          "litre",
          "litre#English"
        ]
      ],
      "synonyms": [
        {
          "word": "g/l"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "plural",
        "uncountable"
      ]
    }
  ],
  "word": "gpl"
}

{
  "head_templates": [
    {
      "args": {
        "1": "unc"
      },
      "expansion": "gpl (plural unc)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "grams per litre"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English words without vowels",
        "en:Units of measure"
      ],
      "glosses": [
        "Abbreviation of grams per litre."
      ],
      "links": [
        [
          "gram",
          "gram#English"
        ],
        [
          "litre",
          "litre#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "plural",
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "g/l"
    }
  ],
  "word": "gpl"
}